the growth of government. >> the second term offers a second chance. and if the president wants to regain the credibility he lost over the last four years on each of these issues, he'll start tonight. >> it's up to florida senator, marco rubio, to deliver the official republican response. he'll be making the case smaller government can help the middle class. the president will touch on other topics, including north korea's latest nuclear test and 34,000 u.s. troops in afghanistan who bring home by this time next year. he'll also be talking about new gun laws. several gun violence victims will be guests at the state of the union. a teacher that survived the sandy hook shooting will be in the first lady's box. former congresswoman, gabby giffords, and her husband are joining the arizona delegation. tara for cbs news, capitol hill. >>> and tomorrow morning, the president is expected to hit the road to make the case for that second term agenda that he'll lay out later on this evening. this is the 100th anniversary of the modern state of the union. presiden